Spark supplied my gas only when I first moved into my property in June 2019. The customer service was good initially so I asked them to supply my electricity on the 11/12/2019. When my first bill came, I also got a bill from my previous electricity provider (Utilita). When I queried with utilita who was providing my electricity, they confirmed the national database stated it was still them. I got back to spark who said they had the wrong meter on their system which was creating charges. I provided evidence of the correct meter twice and also did a burns test to confirm that they have the wrong meter. They have since stopped charging me for electricity but have not deducted the electricity charges from my bill and have given no written correspondance about what they are doing to resolve the complaint. I have wasted hours of my time when they only need to do simple maths and communicate with me. Absolutely horrendous service!